Hair cosmetic

Abstract

A hair cosmetic containing Components (A) and (B): (A) a cationic polymer having a charge density of 5.0 to 7.0 meq/g; and (B) an anionic polymer comprising 80% by mass or more and 100% by mass or less of a constitutional unit represented by Formula (1) and having a weight-average molecular weight of 4,000 or more and 80,000 or less, where R 1 represents a hydrogen atom or a carboxy group; and R 2 represents a hydrogen atom or a methyl group.

The invention claimed is: 
     
       1. A hair cosmetic, wherein the hair cosmetic is a three-part hair dye or bleach composition comprising dimethyl diallyl ammonium chloride homopolymer having a charge density of 5.0 meq/g or more and 7.0 meq/g or less in a first part, hydrogen peroxide in a second part, and sodium polyacrylate having a weight-average molecular weight of 4,000 to 20,000 in a third part. 
     
     
       2. The hair cosmetic according to  claim 1 , wherein a content of dimethyl diallyl ammonium chloride homopolymer is 0.01% by mass and 20% by mass. 
     
     
       3. The hair cosmetic according to  claim 1 , wherein a content of sodium polvacrylate is 0.01% by mass and 20% by mass. 
     
     
       4. The hair cosmetic according to  claim 1 , wherein a mass ratio of dimethyl diallyl ammonium chloride homopolymer to sodium polyacrylate is 0.1 or more and 30 or less. 
     
     
       5. The hair cosmetic according to  claim 1 , wherein dimethyl diallyl ammonium chloride homopolymer has a charge density of 5.5 meq/g or more and 6.5 meq/g or less. 
     
     
       6. The hair cosmetic according to  claim 1 , wherein sodium polyacrvlate has a weight-average molecular weight of 7,000 or more and 18,000 or less. 
     
     
       7. The hair cosmetic according to  claim 1 , wherein dimethyl diallyl ammonium chloride homopolymer has a weight-average molecular weight of 10,000 or more and 3,000,000 or less. 
     
     
       8. The hair cosmetic according to  claim 1 , further comprising a surfactant selected from the group consisting of an anionic surfactant, a nonionic surfactant, a cationic surfactant, and an amphoteric surfactant. 
     
     
       9. The hair cosmetic according to  claim 1 , further comprising a higher alcohol having 12 or more and 30 or less of carbon atoms. 
     
     
       10. The hair cosmetic according to  claim 1 , further comprising a polyol having 2 to 20 carbon atoms. 
     
     
       11. A method of dyeing hair or bleaching hair, comprising
 applying the hair cosmetic according to  claim 1 , leaving the hair cosmetic on hair to stand at 15° C. to 45° C. for 3 to 60 minutes, rinsing the hair with water, and then drying the hair.